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Flashing Rocks

Flashing Rocks

Regular price
$7.95
Sale price
$7.95
Regular price
$7.95
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Knock them together for an electrical effect. Develop and exercise problem-solving, fine motor skills, organization, concentration, and so much more! 
  • 2 quartz rocks with piezoelectric properties
  • Spark and glow in the dark when rubbed against each other
  • Do not hit these rocks together - just rub
  • Best observed in a darkened room
  • A product of the USA
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